干涉条纹快速加窗傅里叶滤波方法的研究  

Study of a Fast Windowed Fourier Filtering Method for Interference Fringes

作　　者：郭媛[1] 毛琦[1] 陈小天[1] 王娜[1] 赵丽娜[1] 

机构地区：[1]齐齐哈尔大学计算机与控制工程学院,黑龙江齐齐哈尔161006

出　　处：《光学学报》2014年第6期151-155,共5页Acta Optica Sinica

基　　金：国家自然科学基金(61100103);黑龙江省自然科学基金(F201219);黑龙江省教育厅科研面上(12521600);齐齐哈尔大学青年重点基金(2011K-02)

摘　　要：滤波是干涉图像处理中的关键问题之一。为解决加窗傅里叶滤波在干涉条纹处理中运行时间长的问题,采用了快速傅里叶变换算法用以减少计算时间。通过加窗傅里叶变换,克服了傅里叶变换在干涉图相位局部信息不能提取的缺点,提出了一种快速加窗傅里叶滤波方法,实现了干涉条纹的快速滤波。在保证滤波效果的同时,缩短了计算时间,大大提高了干涉条纹处理速度,从根本上解决了加窗傅里叶滤波耗时长的问题,使得加窗傅里叶滤波方法应用于散斑在线检测成为了可能。实验验证了本方法的快速性、有效性和可靠性。Filtering is one of the key issues in interferogram processing. In order to solve the long running time of windowed Fourier filtering in processing of interference pattern, a fast Fourier transform in windowed Fourier filtering is adopted to reduce the computation time and overcome the faults of local fringe information cannot be extracted by Fourier transform. A fast windowed Fourier filtering method has been proposed, which can reduce the computation time significantly comparing with convolution method of windowed Fourier filtering without sacrificing measurement accuracy. It has solved the long time-consuming fundamentally and made windowed Fourier filtering method be suitable for real-time speckle detecting. Experiments verify this method is fast, effective and reliable.

关 键 词：图像处理 干涉条纹 快速加窗傅里叶滤波 快速傅里叶变换 处理速度 相位解包裹 

分 类 号：O438[机械工程—光学工程]